For anyone who has been working with new dura ace parts, I have a question. I need to replace my rear 7900 derailleur. Would a 9000 model work with 7900 shifters, shifting over a 10s cassette? I know that there is a new pull ratio for the front derailleur, but I have not read anywhere about a change made on the rear.

There's literally nothing to complain about the new group. I had the pleasure of riding it on a 2013 Super Six and the feel is simply elegant. I love Campy but they have some catching up to do, again. You simply can't bash a groupset that feels this positive.

Think he's referring to the polarising effect of preferences when it comes to aesthetics. Some like the look, others don't. Henc " can be discussed " But nobody seems to be arguing about the performance aspects of it though.

I'll say purely on aesthetics it fails. I saw it recently in my LBS and the exposed internals on the shifters really looks unfinished plus the transition from the shiny to the black parts on the brakes and crank looks very inelegant as if the black is paint which I'm sure it is. They may look better going back to a 7800 like finish with no black.

Lucky for me I'm getting 9070 whose shifters look nicer finished (in pictures) - the RD is a work of art compared to EPS and as I'm running it on a Storck 0.6 no issues with the looks of the brakes or the cranks....

I got a 9000 STI lever which had a rogue screw in the internal of the mechs which blocked the route for the brake cable and meant it was impossible to thread the brake cable through the lever. Took me a good 10 minutes to figure it out ! Bike shop hadn't seen that before. Other than that its a blast.

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